Newly Diagnosed

I am a 59 year old male living in Colorado. I was diagnosed with Parkinson's April of this year. I have had essential tremor for 17 years and was caught by surprise when I was told of my PD by a movement disorder specialist. Turns out my PD symptoms go back 15 years. I have dizziness, headache and balance issues as well as periodic trouble thinking clearly/processing information that vary in intensity during the day but seem to be linked to stress (especially at work). I have cut back to part time as a result (first 30 and now 10 hours per week). Have ruled out any ENT issues and am having a brain MRI as a precaution in the near future although a recent brain CTscan was normal.